When a firecracker explodes, chemical energy changes to light and sound energy.  This is an example of how energy:

• Can be transformed as well as created or destroyed.
• Can be transformed but not created or destroyed.
• Cannot be transformed, created, or destroyed. 
• Cannot be transformed and created, but can be destroyed. 

Tags

NGSS.MS-PS3-5

In a chemical equation, you cannot have NEW elements in the product side of the equation.  This is BEST described by the fact that matter: 

• Can be created but not destroyed. 
• Cannot be created or destroyed.
• Can be destroyed but not created. 
• Can be both created and destroyed. 

Tags

NGSS.MS-PS1-5

The stored energy in a battery can BEST be described as:

• Thermal
• Nuclear
• Kinetic
• Chemical

Which of the following could be used to convert wind energy to electrical energy?

• A chemical storage battery.
• A solar cell.
• A windmill.
• Rotating coils in a magnetic field. 

Which of the following is example of potential energy?

• Gasoline in a car.
• A rock at the top of a hill.
• A baseball bat held motionless in the ready position. 
• All of these are examples of potential energy.

Tags

NGSS.MS-PS3-2

An object at rest begins to move when:

• Balanced forces act on it.
• An unbalanced, or net force, acts on it. 
• Forces are no longer acting on it. 
• An object at rest stays at rest no matter what. 

Tags

NGSS.MS-PS2-2

A 200-kg student kicks a 2.5 kg ball with a force of 500 N.  What force does the ball apply on the student?

• 200 N
• 1250 N
• 300 N
• 500 N

Tags

NGSS.MS-PS2-1

Newton's 3rd Law states that:

• An object in motion will stay in motion unless acted on by an unbalanced force. 
• For every action, there is an equal and opposite reaction. 
• The acceleration of an object depends on the mass of the object and the force applied to it.
• Energy cannot be created or destroyed, only transferred. 

Tags

NGSS.MS-PS2-1

A metal spoon is used to stir a pot of boiling soup.  The person holding the spoon feels the spoon get hot.  Which BEST describes the transfer of heat in the spoon?

• Radiation
• Electrical
• Conduction
• Convection

A car was sitting in sunlight all day long.  The heat that is now contained in the car was transferred to the car PRIMARILY by which of the following processes?

• Convection
• Conduction
• Radiation
• Electrical energy transfer